José José, born José Rómulo Sosa Ortiz, was diagnosed with pancreatic cancer in March 2017. In November of that same year, he started receiving treatment in Florida.

"Dear family, Thank you for your support and for your prayers. I am very well thanks to God. I'm still receiving therapy to get well soon and hopefully see each other. Thanks for everything, a hug and a thousand blessings to all," José José tweeted on June 10.

Other Mexican celebrities like Lucero and Daniela Romo posted old photos of themselves with José José.

"I am so sorry for the departure of our huge, dear and admired José José ... there will never be another voice like yours. Eternal Prince of the Song, rest in peace, we will always remember you. My sincere condolences to your beautiful family and friends," said actress and singer Lucero.